1 #ifndef _BCACHEFS_SUPER_IO_H
2 #define _BCACHEFS_SUPER_IO_H
6 #include "super_types.h"
9 #include <asm/byteorder.h>
11 struct bch_sb_field *bch2_sb_field_get(struct bch_sb *, enum bch_sb_field_type);
12 struct bch_sb_field *bch2_sb_field_resize(struct bch_sb_handle *,
13 enum bch_sb_field_type, unsigned);
14 struct bch_sb_field *bch2_fs_sb_field_resize(struct bch_fs *,
15 enum bch_sb_field_type, unsigned);
17 #define field_to_type(_f, _name) \
18 container_of_or_null(_f, struct bch_sb_field_##_name, field)
20 #define x(_name, _nr) \
21 static inline struct bch_sb_field_##_name * \
22 bch2_sb_get_##_name(struct bch_sb *sb) \
24 return field_to_type(bch2_sb_field_get(sb, \
25 BCH_SB_FIELD_##_name), _name); \
28 static inline struct bch_sb_field_##_name * \
29 bch2_sb_resize_##_name(struct bch_sb_handle *sb, unsigned u64s) \
31 return field_to_type(bch2_sb_field_resize(sb, \
32 BCH_SB_FIELD_##_name, u64s), _name); \
35 static inline struct bch_sb_field_##_name * \
36 bch2_fs_sb_resize_##_name(struct bch_fs *c, unsigned u64s) \
38 return field_to_type(bch2_fs_sb_field_resize(c, \
39 BCH_SB_FIELD_##_name, u64s), _name); \
45 extern const char * const bch2_sb_fields[];
47 static inline bool bch2_sb_test_feature(struct bch_sb *sb,
48 enum bch_sb_features f)
53 return le64_to_cpu(sb->features[w]) & (1ULL << b);
56 static inline void bch2_sb_set_feature(struct bch_sb *sb,
57 enum bch_sb_features f)
59 if (!bch2_sb_test_feature(sb, f)) {
63 le64_add_cpu(&sb->features[w], 1ULL << b);
67 static inline __le64 bch2_sb_magic(struct bch_fs *c)
70 memcpy(&ret, &c->sb.uuid, sizeof(ret));
74 static inline __u64 jset_magic(struct bch_fs *c)
76 return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
79 static inline __u64 pset_magic(struct bch_fs *c)
81 return __le64_to_cpu(bch2_sb_magic(c) ^ PSET_MAGIC);
84 static inline __u64 bset_magic(struct bch_fs *c)
86 return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
89 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
90 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
92 void bch2_free_super(struct bch_sb_handle *);
93 int bch2_super_realloc(struct bch_sb_handle *, unsigned);
95 const char *bch2_sb_validate(struct bch_sb_handle *);
97 int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
98 void bch2_write_super(struct bch_fs *);
100 /* BCH_SB_FIELD_journal: */
102 static inline unsigned bch2_nr_journal_buckets(struct bch_sb_field_journal *j)
105 ? (__le64 *) vstruct_end(&j->field) - j->buckets
109 /* BCH_SB_FIELD_members: */
111 static inline bool bch2_member_exists(struct bch_member *m)
113 return !bch2_is_zero(m->uuid.b, sizeof(uuid_le));
116 static inline bool bch2_dev_exists(struct bch_sb *sb,
117 struct bch_sb_field_members *mi,
120 return dev < sb->nr_devices &&
121 bch2_member_exists(&mi->members[dev]);
124 static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
126 return (struct bch_member_cpu) {
127 .nbuckets = le64_to_cpu(mi->nbuckets),
128 .first_bucket = le16_to_cpu(mi->first_bucket),
129 .bucket_size = le16_to_cpu(mi->bucket_size),
130 .state = BCH_MEMBER_STATE(mi),
131 .tier = BCH_MEMBER_TIER(mi),
132 .replacement = BCH_MEMBER_REPLACEMENT(mi),
133 .discard = BCH_MEMBER_DISCARD(mi),
134 .data_allowed = BCH_MEMBER_DATA_ALLOWED(mi),
135 .valid = !bch2_is_zero(mi->uuid.b, sizeof(uuid_le)),
139 /* BCH_SB_FIELD_replicas: */
141 bool bch2_sb_has_replicas(struct bch_fs *, enum bch_data_type,
142 struct bch_devs_list);
143 int bch2_check_mark_super(struct bch_fs *, enum bch_data_type,
144 struct bch_devs_list);
146 int bch2_cpu_replicas_to_text(struct bch_replicas_cpu *, char *, size_t);
147 int bch2_sb_replicas_to_text(struct bch_sb_field_replicas *, char *, size_t);
149 struct replicas_status {
153 } replicas[BCH_DATA_NR];
156 struct replicas_status __bch2_replicas_status(struct bch_fs *,
157 struct bch_devs_mask);
158 struct replicas_status bch2_replicas_status(struct bch_fs *);
159 bool bch2_have_enough_devs(struct bch_fs *, struct replicas_status, unsigned);
161 unsigned bch2_replicas_online(struct bch_fs *, bool);
162 unsigned bch2_dev_has_data(struct bch_fs *, struct bch_dev *);
164 int bch2_replicas_gc_end(struct bch_fs *, int);
165 int bch2_replicas_gc_start(struct bch_fs *, unsigned);
167 /* iterate over superblock replicas - used by userspace tools: */
169 static inline struct bch_replicas_entry *
170 replicas_entry_next(struct bch_replicas_entry *i)
172 return (void *) i + offsetof(struct bch_replicas_entry, devs) + i->nr;
175 #define for_each_replicas_entry(_r, _i) \
176 for (_i = (_r)->entries; \
177 (void *) (_i) < vstruct_end(&(_r)->field) && (_i)->data_type;\
178 (_i) = replicas_entry_next(_i))
180 #endif /* _BCACHEFS_SUPER_IO_H */